Stump-extractor



FFIQ.

JOHN L. KNO`WLTON, OF GLASSBOROUGH, NEW JERSEY.

STUMP-EXTRACTOR.

Specification of Letters Patent No. 22,561, dated January 11, 1859.

To all whom 'it may concern.'

Be it known that I, J oHN L. KNowLToN, of Glassborough, in the county of Gloucester and State of New Jersey, have invented a new and useful Improvement in Stump-Extractors; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawing and to the letters of reference marked thereon.

My invention consists in forming a simple device for extracting stumps, by combining, in the manner fully described hereafter, a vibrating lever, catches and springs with a hauling chain, the said chain being so guided as to be incapable of twisting or of moving vertically or laterally at the point where it is acted upon by the said catches.

In order to enable others to make and use my invention, I will now proceed to describe its construction and operation.

On reference to the accompanying drawing, which forms a part of this specification; Figure l, is a sectional elevation of my improved stump extractor. Fig. 2, as sectional plan, on the line 1,2 (Fig. Fig. 3, an end View, looking in the direction of the arrow, (Fig. 2). Fig. 4, a transverse section, on the line 3, 4 (Fig. l).

Similar letters refer to similar parts throughout the several views.

The framework consists of two longitudinal beams A and A, secured at the opposite ends to the transverse runners B and B.

C is alever hung to a pin D, which passes through the upper and lower longitudinal beams A and A, the metal strap E, by which the machine is connected to any adjacent trees or stumps, being connected to this pin.

Two hooked catches G and G are hung` to pins in the lever C, one pin being situated on one side, and the other on the other side, and at equal distances from the central pin D.

I-I is the hauling chain, which passes between and is guided by the upper and lower lanched rollers I and I, which turn on pins passing through the projections a and a on the front end of the frame. The chain also passes between and is guided by a similar pair of rollers J and J which turn on pins within recesses in the upper and lower beams A and A of the frame. Both sets of rollers are so formed, that the vertical links are retained in their proper position by the recesses between the anches, while the horizontal links pass between and are retained in their proper position by the peripheries of the lianches of the upper and lower rollers.

On the underside of the longitudinal beam A are secured two guide strips CZ and al', and, on the upper side of the beam A', are two similar strips e and e. The whole of these strips extend from the rollers I and I to the rollers J and J and are so arranged in respect to each other, as to form a passage for the chain, the passage being. of such a form, that the links of the chain are maintained one link in its vertical, the next in its horizontal, the next in its vertical position, and so on throughout. It will be thus seen, that the portion of the chain, between the rollers and in the recess formed by the strips (Z and d and e and e, is maintained rigidly from twisting and sagging either vertically or laterally, although it is perfectly free to move horizontally backward or forward.

The ends of the catches G and Gr are so formed,V that their points pass through the vertical links of the chain, the hollow portion of the hooks of the catches being adapted to the rounded ends of the horizontal links of the chain, as seen in Fig. 2. 'Iwo springs M and M are secured to the frame, one on each side, the ends of these springs terminating at such a point, that a pin projecting from the catch G may bear against the inside of the spring ll/I, and a pin projecting from the catch G may bear against the inside of the spring M', during a portion of the movement of the said catches.

The rod E at the rear of the machine being attached by chains or otherwise to any standing trees or stumps adjacent to the one to be extracted, and the chain H being connected to the latter, its opposite end is passed through the rollers I and I', and thence through the passage formed by the strips el and d and e and e. Motion is then imparted to the lever C, first in one direction and then in the other, by horse or manual power, as the exigencies of the case may require. A reciprocating motion will thus be imparted to the catches Gr and Gr in contrary directions to each other.

As seen in Fig. 2, the hooked end of the catch G has just passed through the link 4 of the chain H, and caught on the rounded end of the link 3. On moving the lever C in the direction of the arrow, the catch G must draw the chain toward the rear of the' machine, while the catch G will leave the rounded end of the link 1 and will advance toward the front of the machine, being"` while doing this, moved clear of the links by its rounded end, until the link 5 takes the position previously occupied by the link 3. Ihen in this position, by the action of the spring M, the hooked end of the catch G will pass through the link 6, and catch over the rounded end of the link 5. The motion of the lever C is then reversed, the chain drawn toward the rear of the machine by the catch G', while the catch G moves forward ready to be forced by the spring M into gear with the rounded end of the link 7, and this operation is continued until the stump is extracted.

The links of the chain, as it is being n hauled, pass through an opening a" in the lower longitudinal beam A.

When the springs INI and M or their equivalents, when the said chain is guided so as to prevent it from twisting, or from moving laterally or vertically, as herein set forth.

In testimony whereof, I have signed my name to this specification in the presence of ltwo subscribing witnesses.

JOHN L. KNOWLTON.

Witnesses t HENRY HowsoN, HENRY ODioRNE. 

